DEVICE FOR CLUTTER-RESISTANT TARGET DETECTION

摘要

The invention relates to a device for passively or actively detecting a target which scatters a useful signal and which is immersed in an observed area comprising elements that are likely to generate clutter echoes forming a non-useful signal, the useful signal having a coherent scattering lobe that is greater than that of the non-useful signal for a given wavelength and given direction, said device including means for receiving the signal scattered by the target, said receiving means including: at a given moment t, at least two separate reception portions having the same polarization, each portion including at least one receiver and one phase center; and a processing means enabling the mutual correlation between at least two received signals, or between at least two signals constructed from signals received at a moment t, each of said received signals being received by a receiver of one of said at least two separate reception portions, characterized in that the phase centers of said at least two reception portions are arranged such that the both of the latter are located in the coherent scattering lobe of a possible useful signal and such that both of the latter are not located in the coherent scattering lobe of the non-useful signal, so as to enable said processing means to detect a possible useful signal present of the non-useful signal, the minimum required distance between said phase centers being that which is required for observing a first decrease in the coefficient of correlation of said at least two constructed signals.